Taking classes at a community college will not matter at all. I've seen lots of threads on here where people have taken their classes at a CC after they graduated and they received admission. There's a lot of career changers that attend these programs who only really had the option of attending CC's.
I know that programs really like to see your AP 1 and 2 grades when you apply, and that those are two of the most important grades to nursing programs
. So yes, I would say that it is best to have those courses completed before a class like biology 1. I also have seen cases where people only had half of the pre-reqs completed and it was an issue for them with regards to receiving acceptances to schools... I can't remember what school, or what thread I saw it on, but it was definitely on some old threads here and it was recently that it happened (like, past year or 2).
I think that your GPA, along with research experience and EMT experience will be huge pluses. I wouldn't be concerned about taking classes at community colleges. Besides the fact that a lot of other people do it, you also have so many other bright spots that will stand out on your application that it really wouldn't be a big deal even if it DID matter. Good luck!